Norway's Air Force F-16 fighters (R) and Italy's Air Force Eurofighter Typhoon fighters patrol over the Baltics during a NATO air policing mission from Zokniai air base near Siauliai, Lithuania, May 20, 2015. REUTERS/Ints Kalnins/File Photo

Norway’s Air Force F-16 fighters (R) and Italy’s Air Force Eurofighter Typhoon fighters patrol over the Baltics during a NATO air policing mission from Zokniai air base near Siauliai, Lithuania, May 20, 2015. REUTERS/Ints Kalnins/File Photo

Norway’s Air Force F-16 fighters (R) and Italy’s Air Force Eurofighter Typhoon fighters patrol over the Baltics during a NATO air policing mission from Zokniai air base near Siauliai, Lithuania, May 20, 2015. REUTERS/Ints Kalnins/File Photo